https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: app-emulation/spice-0.15.0 fails to compile (lto). Discovered on: amd64 (internal ref: lto_tinderbox) NOTE: This machine uses lto with CFLAGS=-flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing Here is a bit of explanation: -Werror=lto-type-mismatch: User to find possible runtime issues in packages. It likely means the package is unsafe to build & use with LTO. For projects using the same identifier but with different types across different files, they must be fixed to be consistent across the codebase. -Werror=odr: Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO. C++ code must comply with the One Definition Rule (ODR) - see https://en.cppreference.com/w/cpp/language/definition#One_Definition_Rule. -Werror=strict-aliasing: Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO. Workarounds: - If upstream is friendly and still active, file a bug upstream. For emulators, codecs, games, or multimedia packages, it may be worth just applying a workaround instead, as upstreams sometimes aren't receptive to these bugs (VALID FOR ALL). - Use the new 'filter-lto' from flag-o-matic.eclass as it's likely to be unsafe with LTO (VALID FOR lto-type-mismatch - odr). - Fix it yourself if interested, of course (VALID FOR ALL). - Append-flags -fno-strict-aliasing (VALID FOR strict-aliasing). - Use memcpy() but a union is sometimes suitable too (VALID FOR strict-aliasing). - -fstrict-aliasing is implied by -O2, so this must be addressed in some form (VALID FOR strict-aliasing). See also: https://marc.info/?l=gentoo-dev&m=165639574126280&w=2
Created attachment 800015 [details] build.log build log and emerge --info
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=4bdbf83d20cbb594e70507b64f3831d964b3e60b commit 4bdbf83d20cbb594e70507b64f3831d964b3e60b Author: John Helmert III <ajak@gentoo.org> AuthorDate: 2022-12-18 02:31:54 +0000 Commit: John Helmert III <ajak@gentoo.org> CommitDate: 2022-12-18 02:34:19 +0000 app-emulation/spice: add 0.15.1 Building with LTO should be fixed by [1], and the openssl-3 issue by [2]. Both in 0.15.1. [1] https://gitlab.freedesktop.org/spice/spice/-/commit/0b86b6808a06c482ea2bdef9f24be42e0dcb74ae [2] https://gitlab.freedesktop.org/spice/spice/-/commit/3d32295f9e99054ae1a40d220ccef53a176c8aed Bug: https://bugs.gentoo.org/865649 Bug: https://bugs.gentoo.org/885969 Signed-off-by: John Helmert III <ajak@gentoo.org> app-emulation/spice/Manifest | 1 + app-emulation/spice/spice-0.15.1.ebuild | 99 +++++++++++++++++++++++++++++++++ 2 files changed, 100 insertions(+)
